<?php  
function verify_email($email){  
    if(eregi("^[_a-zA-Z0-9-]+(.[_a-zA-Z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]{2,15})*(.[a-z]{2,3})$", $email) ){  
        return TRUE;  
    }else{  
        return FALSE;  
    }  
}
?>